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Old Feb 10, 2008, 06:28 AM
skyhawk is offline
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A-4 nut!!
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Another one bites the dust.

UH-1's buddy just smoked his A-4 motor. Wow - this seems to be more of a plague than a glitch.
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Old Feb 10, 2008, 08:52 AM
wedge98 is offline
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Quote:
Originally Posted by Extreme_RC
There is nothing wrong with high RPM inrunners, its all about quality. Even the Taiwan made 210-8XL motor spins at 58K+ rpm in the XF fan with utter reliability.

This GWS fan is running around 35-37,000rpm, hardly high rpm

What we have here is a poor QC situation from another overpriced Chinese motor. Its funny, the first batch of 2040 size motors I got were perfect, then things moved to China and I had 5 motors with shafts bent or ground off centre, 3 with end caps coming loose, 2 with shorted exit wires. No magnet issues though.
My thoughts exactly. I'll be sticking with lightflightrc's ARC motors.
Old Feb 11, 2008, 12:18 PM
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Seeing the Farside.
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Not to gloat too much but, I'm sure glad I glued in the stick mount to go pusher right off the bat.

Maybe I'll build my second with a 6904 and 16-15-2.


-Chris
Old Feb 14, 2008, 05:01 AM
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Birds do it, bees do it
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Could one of the guys who has flown the J-10 please post a photo of the battery area? I've looked through the manual but can't figure out how the pack is going to sit seeing as the canard servo seems to be in the batt tray. Does your pack interfere with the servo arm and linkage?

Thanks.

Jeff
Old Feb 14, 2008, 05:23 AM
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You will end up with the battery stuck as far back towards the tail as the battery can go and may even have to perform some minor surgery on it, in order to achieve the recommended cg.

chewy
Old Feb 14, 2008, 05:29 AM
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Mr Chen, Mr. Lin,

Aren't you guys back at work yet? How about a replacement motor for those of us whose motor died due to thrown magnets etc?

You gotta be responsible for your qc and/or R&D in the proper glue to use for the magnet.

chewy
Last edited by chewytm; Feb 14, 2008 at 02:15 PM.
Old Feb 14, 2008, 05:41 AM
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Birds do it, bees do it
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Quote:
Originally Posted by chewytm
You will end up with the battery stuck as far back towards the tail as the battery can go and may even have to perform some minor surgery on it, in order to achieve the recommended cg.
Thanks for the reply. There doesn't seem to be much room to move the pack backwards. Guess you had to rip out some foam behind the cockpit?

Hope you get your motor problems sorted out. I'm looking into getting a HET 2W.

Jeff
Old Feb 14, 2008, 07:00 AM
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Quote:
Originally Posted by ParkJeff
Could one of the guys who has flown the J-10 please post a photo of the battery area? I've looked through the manual but can't figure out how the pack is going to sit seeing as the canard servo seems to be in the batt tray. Does your pack interfere with the servo arm and linkage?

Thanks.

Jeff
Here is a photo of my battery installed. I have not installed the canard and its servo yet but their positions are shown on the photo. The canard joining rod is 66 mm in front of my battery. and the canard servo is 115 mm ahead of the battery.

Ken
Last edited by kensp; Feb 14, 2008 at 08:09 AM.
Old Feb 14, 2008, 01:01 PM
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Birds do it, bees do it
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Hi Ken,

Thanks for the photo. I could not have imagined how far back the battery has to be pushed. I now understand what Chewy means by sticking the pack as far back as possible.

Jeff
Old Feb 14, 2008, 06:06 PM
usmc_VTOL_mech is offline
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hotrod builder
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My Battery sits directly over the Canard servo
3300 Mah 3 cell
Old Feb 14, 2008, 06:57 PM
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Did you manage to get the recommended cg with the batts like that? If the cg is forward of stock, then do you have any signs of it being nose-heavy?

If you managed the stock cg, how much ballast did u have to add at the tail?

chewy
Old Feb 14, 2008, 08:01 PM
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Quote:
Originally Posted by usmc_VTOL_mech
My Battery sits directly over the Canard servo
3300 Mah 3 cell
Thanks for the pic. Does the pack rest on the servo and does it interfere with canard control? Do you velcro the pack to the walls of the batt compartment?

Jeff
Old Feb 14, 2008, 08:37 PM
usmc_VTOL_mech is offline
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hotrod builder
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Chewytm
Stock CG as per recommended in the manual
No additional weight added
Parkjeff no there is a small balsa spar installed over the servo canard control arm so it does not interfere at all
Last edited by usmc_VTOL_mech; Feb 14, 2008 at 08:37 PM. Reason: typo
Old Feb 14, 2008, 09:25 PM
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How did you manage that? What kind of batts are you using? What is its weight? I couldn't get it anywhere near the stock cg without sticking the batts in as shown by Ken.

BTW, have you flown it? Any nose heavy tendencies?

chewy
Old Feb 14, 2008, 10:12 PM
usmc_VTOL_mech is offline
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hotrod builder
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Chewytm
Yes I have flown it about 15 to 17 times already
No nose heavy at all glides in nicely with a nose high attitude as matter of fact
I have no idea the batteries weight
3300 Mah
I did open the stock battery compartment to fit this battery but turned out I couldn't even put it there


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